Exam 2

Question 1

Normal distribution

Answer 1

Bell curve Distibution normall occurs with normal

Question 2

Posiison distribution

Answer 2

measures possibility of event occurring at specific time and place (random arrivals)

Question 3

Binomial distribution

Answer 3

When there are only 2 possible outcomes

Question 4

discrete probaility

Answer 4

totals to 1

Question 5

what is replacement

Answer 5

whether something can be returned to collection after draw

Question 6

what is discrete probability

Answer 6

individually countable outcomes can only be whole numbers

Question 7

finding binomial distribution of a number less then or equal to
ex 1

Answer 7

use binomial probability formula for number and one number below

the answer is sum of the two numbers

(do opposite for a number larger then)

Question 8

finding binomial distribution for a number greater then x

Answer 8

do binomial distribution of number 1 larger then the value

Question 9

in continiuous the probability that x is less than or equal to a value is the same that x is less then the value

Answer 9

true
continuous distributions are 0 at an exact value

Question 10

whats the SD of a normal distribution

Answer 10

1

Question 11

arbitrary vs standard normal distribution

Answer 11

arbitary distibution can have a normal bell shapped cruve

standard normal distibtuion curve is centered around mean of 0 and SD of 1

Both can be connected by z score

Question 12

what are the distribution tables

Answer 12

standard normal distribution table

Question 13

exponential distribution

Answer 13

measures the amount of time it takes to get a success in continuously occurring trials. difference between 2 poison distributions

ex time to failure

Question 14

with standard deviation how much of the data fall under +/- 1 standard deviation from the mean

Answer 14

68%

Question 15

with standard deviation how much of the data fall under +/- 2 standard deviation from the mean

Answer 15

95%

Question 16

with standard deviation how much of the data fall under +/- 3 standard deviation from the mean

Answer 16

99.7%

Question 17

whats the formula to find where something is on a normal Distibution

Answer 17

mean-SD= lower limit
Mean+ SD= upper limit

Mean-2SD=lower limit
Mean+2SD=upper limit

Question 18

what probabilities are continuous

Answer 18

exponential and uniform

Question 19

what probabilities are discreete

Answer 19

normal, binomial, poission

Question 20

what does N(5,2) and N(5,1) mean and what can be said about them

Answer 20

mean of 5 and SD of 2 both have the average in the same place the largest dispersion will have a fatter curve

Question 21

uniform probability formulas

Answer 21

(f2-f1)/b-a

Question 22

Uniform dist: what do you do differently if the question asks for betwen 2 amounts of servive vs atleast

Answer 22

betwen 2 values change numerator to fit that

if atleast one value chnage one value in numerator

Question 23

How to use a poisson probability table when asking for values greater then

Answer 23

find all values including that number and less and subtract them all from one

Question 24

How to use a poisson probability table when asking for values LESS then

Answer 24

find all values under that number and add them together

Question 25

how to do exponential problem x<=1

Answer 25

use the formula normally

Question 26

how to do exponential problem x>